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Stumbled on this when looking into putting seafoam into the oil. I found this on another forum, its a response from a seafoam employee when asked about putting it in your oil

Sea Foam is an OIL PRODUCT, not a chemical, so do not worry about any secondary affects.

If your bikes engine began to create enough residue to “STICK” part of your valve train, IT IS TIME TO GET THAT OLD OIL OUT OF THERE!

Yes, the Sea Foam cleans the old deteriorated oil back to liquid, but your crankcase oil will quickly make more residue, your oil has reached the end of its SERVICEABLE LIFE!

Change your oil, read the attachment I have given on CRANKCASE OIL, treat the NEW oil with Sea Foam at 1 1/2 ounces per quart of oil capacity, then MONITOR YOUR OIL and change it when it gets dirty.

Oil is still cheaper than an engine!

Sea Foam Motor Treatment used in Crankcase Oil

All Gasoline and Diesel, Rotary style engines

Sea Foam Motor Treatment is a Blended Petroleum Product, NOT A CHEMICAL and is widely used as an old oil residue cleaner and moisture drier in any oil crankcase.

Sea Foam Motor Treatment is most commonly used as a pre service, old oil residue re-liquefier / cleaner and moisture drier, and is also used as an after service additive. Sea Foam Motor Treatment does NOT add significantly to oil volume, so removing oil is NOT required for use, when used according to printed directions on the product container.

1. As a PRE-SERVICE CLEANER for old oil residue, (sticky rings or valve train noise), pour 1 ½ ounces of Sea Foam Motor Treatment into the engine oil crankcase for EACH quart of crankcase oil capacity including filter. (Diesels use 1 pint Sea Foam to 4 gallons of oil, please.) Drive a MINIMUM of 30 minutes/miles, MAXIMUM 100 miles, and then do your oil change service (LOF). This is the process of safely/slowly re liquefying the old oil residue so contaminants may flow and be filtered. This also makes your old oil dirtier, quickly, so a LOF service is necessary when the oil gets dirty. Great for Turbocharged & Supercharged applications where hot oils deteriorate so quickly due to heat, and leaves those residues that NEED CLEANING. (LOF = Lube oil & Filter service = OIL CHANGE).

2. As an AFTER SERVICE ADDITIVE into fresh oil, nearly fresh oil, or oil (used condition) that is NOT ready to be changed (by mileage), put 1 ½ ounces Sea Foam Motor Treatment into the crankcase per quart of capacity as described above, then SELF SET a program to MONITOR your oil for level, color and clarity on a mileage, timed, or event basis (like every time you add fuel, etc.) to determine when an oil service is necessary. (LOF) When the oil gets dirty, CHANGE IT!

Sea Foam Motor Treatment will safely and slowly re liquefy old oil residue, This will make your oil need changing BEFORE your normal scheduled LOF service. Only your monitoring of the oil for colour and clarity can tell when it is time to do LOF - oil change service, or 3,000 miles, whichever comes first.

Synthetic oils, both blends and 100%, were engineered and are manufactured to be 100% compatible with petroleum based oils, all brands, and vice-versa. Without compatibility, oil manufacturers and engineers would be liable for the results of mixing non-compatible lubricants.

2. Sea Foam Motor Treatment contains an oil component that dries fuel system moisture. Moisture breaks down into its basic components of hydrogen and oxygen when Sea Foam Motor Treatment is added to any of the above listed fuels, allowing Sea Foam Motor Treatment to help eliminate problems caused by moisture, like diesel fuel gelling and poor run .Advantage: “Sea Foam”.

3. Sea Foam Motor Treatment contains an oil based high detergent fuel residue cleaner. Using Sea Foam Motor Treatment in your fuel system makes that old fuel residue safely back into liquid. Moisture becomes a “non issue” and allows contaminants to be filtered, as engineered by the manufacturer.
Advantage: “Sea Foam”.

4. Sea Foam Motor Treatments exclusive formula is blended specifically to clean carbon out of the engine as the engine is run. This is accomplished by our cleaning oil formula eliminating old sticky oil residue that holds carbon and allowing that carbon to flow out of the engine dust particle by dust particle. Advantage: “Sea Foam”.

5. Sea Foam Motor Treatment adds volatility to fuel and slows down the rate at which that fuel looses its ability to properly burn. When added to fuel and the fuel is in properly sealed containers or fuel systems, per printed container instructions, Sea Foam Motor Treatment is a fuel stabiliser for up to 2 years. Always run the engine for a long enough period of time to assure the entire system is protected.
Advantage: “Sea Foam”.

Technical Services Department
Sea Foam Sales Company

Updated May, 2008 DD

Sea Foam Amounts in Fuel

4 Cycle Type Engines
Diesel
Rotary (Wankel)
2 Cycle type Engines

Sea Foam Products recommends an average of 1 ounce Sea Foam Motor Treatment to each gallon of Gasoline (including 10% & 15% ethanol) and Diesel fuel (including low sulphur & Ultra Low Sulphur blends). With any vehicle or system FACTORY DESIGNED for E-85 fuel, use 2 ounces Sea foam per gallon of the fuel.